/*
 * Copyright © 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Reflection;
using AopAlliance.Intercept;
using Spring.Aop.Framework.Adapter;

namespace Spring.Aop.Framework;

/// <summary>
/// Utility methods for use by
/// <see cref="Spring.Aop.Framework.IAdvisorChainFactory"/> implementations.
/// </summary>
/// <remarks>
/// <p>
/// Not intended to be used directly by applications.
/// </p>
/// </remarks>
/// <author>Rod Johnson</author>
/// <author>Aleksandar Seovic (.NET)</author>
public sealed class AdvisorChainFactoryUtils
{
    /// <summary>
    /// Gets the list of
    /// <see langword="static"/> interceptors and dynamic interception
    /// advice that may apply to the supplied <paramref name="method"/>
    /// invocation.
    /// </summary>
    /// <param name="config">The proxy configuration.</param>
    /// <param name="proxy">The object proxy.</param>
    /// <param name="method">
    /// The method to evaluate interceptors for.
    /// </param>
    /// <param name="targetType">
    /// The <see cref="System.Type"/> of the target object.
    /// </param>
    /// <returns>
    /// A <see cref="System.Collections.IList"/> of
    /// <see cref="AopAlliance.Intercept.IMethodInterceptor"/> (if there's
    /// a dynamic method matcher that needs evaluation at runtime).
    /// </returns>
    public static IList<object> CalculateInterceptors(
        IAdvised config, object proxy, MethodInfo method, Type targetType)
    {
        IList<object> interceptors = new List<object>(config.Advisors.Count);
        foreach (IAdvisor advisor in config.Advisors)
        {
            if (advisor is IPointcutAdvisor)
            {
                IPointcutAdvisor pointcutAdvisor = (IPointcutAdvisor) advisor;
                if (pointcutAdvisor.Pointcut.TypeFilter.Matches(targetType))
                {
                    IMethodInterceptor interceptor =
                        (IMethodInterceptor) GlobalAdvisorAdapterRegistry.Instance.GetInterceptor(advisor);
                    IMethodMatcher mm = pointcutAdvisor.Pointcut.MethodMatcher;
                    if (mm.Matches(method, targetType))
                    {
                        if (mm.IsRuntime)
                        {
                            // Creating a new object instance in the GetInterceptor() method
                            // isn't a problem as we normally cache created chains...
                            interceptors.Add(new InterceptorAndDynamicMethodMatcher(interceptor, mm));
                        }
                        else
                        {
                            interceptors.Add(interceptor);
                        }
                    }
                }
            }
        }

        return interceptors;
    }

    /// <summary>
    /// Creates a new instance of the
    /// <see cref="Spring.Aop.Framework.AdvisorChainFactoryUtils"/>
    /// class.
    /// </summary>
    /// <remarks>
    /// <p>
    /// This is a utility class, and as such has no publicly visible
    /// constructors.
    /// </p>
    /// </remarks>
    private AdvisorChainFactoryUtils()
    {
    }

    // CLOVER:ON
}
